www/gohugo: Update to 0.46

Change log:

• Resources fetched via resources.Get and similar are now considered global across languages. If you need, as an example, to create a CSS per language, you need to set the path yourself.
• Add templates.Exists template function. This can be used to check if a template, e.g. a partial, exists in the project or any of the themes in use.
• Remove superflous loop
• Update Chroma
• Make resources fetched via resources.Get and similar language agnostic
• Improve SCSS project vs themes import resolution
• Improve _ prefix handling in SCSS imports
• Fix file paths for uncached transformed images
• Fix image cache eviction for sites with subdir in baseURL

PR: 230268
Submitted by: ben.lavery@hashbang0.com (maintainer)
Reviewed by: mat (mentor)
Approved by: mat (mentor)
Differential Revision: https://reviews.freebsd.org/D16545